How long do I need to wait to paint an exterior of a house after powerwashing?

Answers to pro painters’ most pressing questions by Rick Watson.

Depending on the substrate and weather, you may need to allow at least 48 hours of drying before priming or topcoating. Lower temperatures, high humidity and porous surfaces may need longer to dry out before painting. If the humidity remains high (such as 90 percent) or it has rained, you may need to wait longer.

This article was originally published in the Fall 2019 issue of PPC magazine. Rick Watson, Product Information, Sherwin-Williams, answers contractor questions in the Ask Your ProPartner™ column of PPC magazine. Read more of his answers to pro painters’ most pressing questions.

Got a question not answered here? Stop by your local Sherwin-Williams store or contact your sales rep. Their employees are trained to have the product knowledge and application expertise to solve your toughest coating problems. Find a store near you.

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